It's reasonable price for one light here, easy to find following Evan's motions,a Japanese named Hero here who's the friend of Evan ,he is also nice ,I suggest if someone comes from Don Mueang International airport, you can try following airport sign to the railway station, then take the train to HuaLamphong train station, change MRT to Lumpini station.It should be a nice trip, and just 40 minutes,RMB 1 for travel between both. you can see around on the way.